/*
 * Copyright 2008 The Apache Software Foundation Licensed under the Apache
 * License, Version 2.0 (the "License"); you may not use this file except in
 * compliance with the License. You may obtain a copy of the License at
 * http://www.apache.org/licenses/LICENSE-2.0 Unless required by applicable law
 * or agreed to in writing, software distributed under the License is
 * distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied. See the License for the specific language
 * governing permissions and limitations under the License.
 */

package org.apache.ibatis.ibator.generator.ibatis2.sqlmap.elements;

import org.apache.ibatis.ibator.api.dom.xml.Attribute;
import org.apache.ibatis.ibator.api.dom.xml.TextElement;
import org.apache.ibatis.ibator.api.dom.xml.XmlElement;
import org.apache.ibatis.ibator.generator.XmlConstants;

/**
 * @author matychen
 */
public class MysqlPaginationLimitGenerator extends AbstractXmlElementGenerator
{

	public static final String MYSQL_PAGINATION_LIMIT = "Mysql_Pagination_Limit";

	public MysqlPaginationLimitGenerator()
	{
		super();
	}

	@Override
	public void addElements(XmlElement parentElement)
	{
		XmlElement answer = new XmlElement("sql"); //$NON-NLS-1$

		answer.addAttribute(new Attribute(
				"id", XmlConstants.COMMON + "." + MYSQL_PAGINATION_LIMIT)); //$NON-NLS-1$

		ibatorContext.getCommentGenerator().addComment(answer);

		XmlElement dynamicElement = new XmlElement("dynamic");
		XmlElement outerisNotEmptyElement = new XmlElement("isNotNull");
		outerisNotEmptyElement.addAttribute(new Attribute("property",
				"mysqlOffset"));
		XmlElement innerisNotEmptyElement = new XmlElement("isNotNull");
		innerisNotEmptyElement.addAttribute(new Attribute("property",
				"mysqlLength"));
		innerisNotEmptyElement.addElement(new TextElement(
				"<![CDATA[ limit #mysqlOffset# , #mysqlLength# ]]>"));
		outerisNotEmptyElement.addElement(innerisNotEmptyElement);
		dynamicElement.addElement(outerisNotEmptyElement);
		answer.addElement(dynamicElement);
		// 在第二个地方增加
		parentElement.addElement(answer);
	}
}
